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# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Notification do
use Ecto.Schema
alias Pleroma.{User, Activity, Notification, Repo, Object}
import Ecto.Query
schema "notifications" do
field(:seen, :boolean, default: false)
belongs_to(:user, Pleroma.User)
belongs_to(:activity, Pleroma.Activity)
timestamps()
end
# TODO: Make generic and unify (see activity_pub.ex)
defp restrict_max(query, %{"max_id" => max_id}) do
from(activity in query, where: activity.id < ^max_id)
end
defp restrict_max(query, _), do: query
defp restrict_since(query, %{"since_id" => since_id}) do
from(activity in query, where: activity.id > ^since_id)
end
defp restrict_since(query, _), do: query
def for_user(user, opts \\ %{}) do
query =
from(
n in Notification,
where: n.user_id == ^user.id,
order_by: [desc: n.id],
preload: [:activity],
limit: 20
)
query =
query
|> restrict_since(opts)
|> restrict_max(opts)
Repo.all(query)
end
def set_read_up_to(%{id: user_id} = _user, id) do
query =
from(
n in Notification,
where: n.user_id == ^user_id,
where: n.id <= ^id,
update: [
set: [seen: true]
]
)
Repo.update_all(query, [])
end
def get(%{id: user_id} = _user, id) do
query =
from(
n in Notification,
where: n.id == ^id,
preload: [:activity]
)
notification = Repo.one(query)
case notification do
%{user_id: ^user_id} ->
{:ok, notification}
_ ->
{:error, "Cannot get notification"}
end
end
def clear(user) do
from(n in Notification, where: n.user_id == ^user.id)
|> Repo.delete_all()
end
def dismiss(%{id: user_id} = _user, id) do
notification = Repo.get(Notification, id)
case notification do
%{user_id: ^user_id} ->
Repo.delete(notification)
_ ->
{:error, "Cannot dismiss notification"}
end
end
def create_notifications(%Activity{id: _, data: %{"to" => _, "type" => type}} = activity)
when type in ["Create", "Like", "Announce", "Follow"] do
users = get_notified_from_activity(activity)
notifications = Enum.map(users, fn user -> create_notification(activity, user) end)
{:ok, notifications}
end
def create_notifications(_), do: {:ok, []}
# TODO move to sql, too.
def create_notification(%Activity{} = activity, %User{} = user) do
unless User.blocks?(user, %{ap_id: activity.data["actor"]}) or
user.ap_id == activity.data["actor"] or
(activity.data["type"] == "Follow" and
Enum.any?(Notification.for_user(user), fn notif ->
notif.activity.data["type"] == "Follow" and
notif.activity.data["actor"] == activity.data["actor"]
end)) do
notification = %Notification{user_id: user.id, activity: activity}
{:ok, notification} = Repo.insert(notification)
Pleroma.Web.Streamer.stream("user", notification)
Pleroma.Web.Push.send(notification)
notification
end
end
def get_notified_from_activity(activity, local_only \\ true)
def get_notified_from_activity(
%Activity{data: %{"to" => _, "type" => type} = _data} = activity,
local_only
)
when type in ["Create", "Like", "Announce", "Follow"] do
recipients =
[]
|> maybe_notify_to_recipients(activity)
|> maybe_notify_mentioned_recipients(activity)
|> Enum.uniq()
User.get_users_from_set(recipients, local_only)
end
def get_notified_from_activity(_, _local_only), do: []
defp maybe_notify_to_recipients(
recipients,
%Activity{data: %{"to" => to, "type" => _type}} = _activity
) do
recipients ++ to
end
defp maybe_notify_mentioned_recipients(
recipients,
%Activity{data: %{"to" => _to, "type" => type} = data} = _activity
)
when type == "Create" do
object = Object.normalize(data["object"])
object_data =
cond do
!is_nil(object) ->
object.data
is_map(data["object"]) ->
data["object"]
true ->
%{}
end
tagged_mentions = maybe_extract_mentions(object_data)
recipients ++ tagged_mentions
end
defp maybe_notify_mentioned_recipients(recipients, _), do: recipients
defp maybe_extract_mentions(%{"tag" => tag}) do
tag
|> Enum.filter(fn x -> is_map(x) end)
|> Enum.filter(fn x -> x["type"] == "Mention" end)
|> Enum.map(fn x -> x["href"] end)
end
defp maybe_extract_mentions(_), do: []
end
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